1994455401 has 8 divisors (see below), whose sum is σ = 2745057024. Its totient is φ = 1286745360.

The previous prime is 1994455381. The next prime is 1994455429. The reversal of 1994455401 is 1045544991.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1994455401 - 2⁷ = 1994455273 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1994455301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10722786 + ... + 10722971.

It is an arithmetic number, because the mean of its divisors is an integer number (343132128).

Almost surely, 2^1994455401 is an apocalyptic number.

It is an amenable number.

1994455401 is a deficient number, since it is larger than the sum of its proper divisors (750601623).

1994455401 is a wasteful number, since it uses less digits than its factorization.

1994455401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21445791.

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 1994455401 is about 44659.3260249189. The cubic root of 1994455401 is about 1258.7556794797.

The spelling of 1994455401 in words is "one billion, nine hundred ninety-four million, four hundred fifty-five thousand, four hundred one".